# Regexps
x = //
x = (//)
x = (/test/)
x = //mig
x = //gim
x = /something/gim
x = /\//
x = /\n/
x = /ab\/ ab/
x = f /6 * 2/ - 3
x = f /foo * 2/gm
x = if true then /\n/ else /[.,]+/
x = ///^key-#{key}-\d+///

# not a Regexp
x = //test
x = /boo/test